I mean... it's crypto, it's not like any big international news agency will catch the story of a small crypto casino closing shop...
Unfortunately, it's like you said. If the authorities can't get people behind so many crypto exchanges that disappeared with people's money, they will probably never find these casino operators. Even if they do, each victim would have to file a report. If not enough people do it and the sum is small enough, they'll be given a fine and probably a suspended sentence.
You need to owe 10 million dollars in crypto or more for the authorities to get interested in you like they were in Mark Karpeles, SBF, or that Russian who hacked Bitfinex.
the fact authorities do not get involve yet does not mean people are supposed to stay still and do nothing. There have been many examples on the internet how communities and group join their efforts to pursue other who committed fraud or other crimes. It is about doing some of the search job so legal and formal authorities can get their way easier.
I am not sure how much that casino was worth in total deposits which belongs to gamblers, but 10 million is a quite easy figure for a casino which relatively popular around here (and probably on other communities).
Letting scammers to successfully run away with all the money will only encourage others to do the same.